CN118650446A - Portable pipeline welding positioning device and welding positioning method - Google Patents

Abstract

The invention discloses a portable pipeline welding positioning device and a welding positioning method, belonging to the technical field of pipeline welding positioning; comprising a mobile frame, a mobile wheel mechanism with a position adjustment function, a frame positioning mechanism with a specific position adjustment function, a pneumatic adjustment mechanism, a pipeline positioning mechanism with a telescopic function, a pipeline misalignment adjustment mechanism with a cutting position indication function and a power adjustment mechanism with a self-locking function; the portable pipeline welding positioning device and the welding positioning method of the invention are simple to operate, can perform precise cutting and positioning on pre-jointed pipelines, and the welding operation is more convenient and the welding quality is good.

Description

Portable pipeline welding positioning device and welding positioning method

Technical Field

The invention relates to a portable pipeline welding positioning device and a welding positioning method, belonging to the technical field of pipeline welding positioning.

Background Art

In the field of steel pipe engineering, both the construction stage and the pipeline maintenance stage are inseparable from the cutting and welding of pipelines. In the pre-buried steel pipe construction stage, when the pipelines between two construction sections need to be connected, the pipelines in the construction stage will reserve excess pipelines, and when the two pipelines are connected, the pipelines need to be cut and then welded. In the prior art, when cutting and welding the pipeline between two sections, the pipeline is mostly cut and welded in position with the help of manpower or other auxiliary mechanical equipment, but the existing pipeline welding positioning devices are mostly set on large welding machines, which are difficult to carry to the construction site for auxiliary welding; and when the pipeline is cut in position with manpower or other mechanical equipment, the position is estimated by the cutting machine according to the position of the pipeline; when the pipeline is welded in position, not only is it easy to have uneven cutting seams, but the size of the weld gap between the two pipelines is difficult to control, which greatly increases the difficulty of pipeline welding, and when there is a misalignment between the two reserved pipelines, without the assistance of professional positioning equipment, the difficulty of pipeline welding positioning will also be greatly increased; therefore, in order to facilitate the welding positioning of the pre-buried pipelines during construction, it is urgent to propose a portable pipeline welding positioning device and welding positioning method.

Summary of the invention

In order to solve the above problems, the present invention proposes a portable pipeline welding positioning device and welding positioning method, which are simple to operate, can perform precise cutting and positioning on pre-jointed pipelines, and the welding operation is more convenient and the welding quality is good.

A portable pipeline welding positioning device of the present invention comprises a mobile frame, a mobile wheel mechanism with a position adjustment function, a frame positioning mechanism with a specific position adjustment function, a pneumatic adjustment mechanism, a pipeline positioning mechanism with a telescopic function, a pipeline misalignment adjustment mechanism with a cutting position indication function, and a power adjustment mechanism with a self-locking function;

The moving wheel mechanism is arranged on both sides of the bottom of the moving frame and is used for the movement of the moving frame;

The frame positioning mechanism is arranged on the other two sides of the bottom of the mobile frame, and is used to horizontally position the position of the mobile frame;

The pneumatic positioning mechanism is arranged on the moving frame, and the pneumatic positioning mechanism is respectively connected with the moving wheel mechanism and the frame positioning mechanism, and is used for the alternating movement of the moving wheel mechanism and the frame positioning mechanism;

The pipeline positioning mechanism is provided with two groups, and the two groups of pipeline positioning mechanisms are symmetrically arranged on both sides of the top of the mobile frame, and are used to fix the pipeline to be welded;

The pipeline misalignment adjustment mechanism is provided with two groups, and the two groups of pipeline misalignment adjustment mechanisms are symmetrically arranged between the two groups of pipeline positioning mechanisms; a welding cavity is formed between the two groups of pipeline misalignment adjustment mechanisms, which is used to adjust the position of one side of the pipeline to be welded;

The power regulating mechanism is arranged on the side of the pipeline misalignment regulating mechanism and is used to drive the pipeline misalignment regulating mechanism to move, and the power regulating mechanism is respectively connected to the two groups of pipeline misalignment regulating mechanisms in transmission.

Further, the mobile wheel mechanism includes a mobile component, a first pneumatic positioning pipe network and a first pneumatic box; the mobile components are provided with four, and the four mobile components are evenly distributed at the four corners of the mobile frame; the first pneumatic positioning pipe network is arranged on the mobile frame, and the first pneumatic positioning pipe network is respectively connected with the four mobile components; the first pneumatic box is arranged at the bottom center of the mobile frame, and the first pneumatic box is connected with the first pneumatic positioning pipe network;

Each of the moving components includes: a moving stamping cylinder, a moving slider, a hexagonal moving rod and a universal moving wheel; the moving stamping cylinder is vertically arranged on the moving frame; the moving slider is sealed and slidably arranged in the moving stamping cylinder, and the interior of the moving stamping cylinder is divided into a first stamping area and a first moving area by the moving slider; the first pneumatic positioning pipe network is connected to the first stamping area; one end of the hexagonal moving rod is connected to the lower bottom surface of the moving slider; the other end of the hexagonal moving rod passes through the moving stamping cylinder and extends to the bottom of the moving frame; a plurality of first limit bolts for fixing the hexagonal moving rod are threadedly connected to the bottom of the moving stamping cylinder; the universal moving wheel is installed at the bottom of the hexagonal moving rod.

Further, the frame positioning mechanism includes a positioning component, a second pneumatic positioning pipe network and a second pneumatic box; the positioning components are provided in plurality, and the plurality of positioning components are evenly distributed on the left and right sides of the mobile frame; the second pneumatic positioning pipe network is provided on the mobile frame, and the second pneumatic positioning pipe network is respectively connected to the plurality of positioning components; the second pneumatic boxes are provided in two, and the second pneumatic boxes are staggeredly arranged on the front and rear sides of the first pneumatic box, and the two second pneumatic boxes are respectively connected to the second pneumatic positioning pipe network;

Each of the positioning components includes a positioning stamping cylinder, a positioning slider, a hexagonal positioning rod and a barbed gripping seat; the positioning stamping cylinder is vertically arranged on the mobile frame; the positioning slider is sealed and slidably arranged in the positioning stamping cylinder, and the interior of the positioning stamping cylinder is divided into a second stamping area and a second moving area by the positioning slider; the second pneumatic positioning pipe network is connected to the second stamping area; one end of the hexagonal positioning rod is connected to the lower bottom surface of the positioning slider, and the other end of the hexagonal positioning rod passes through the positioning stamping cylinder and extends to the bottom of the mobile frame; a plurality of second limit bolts for fixing the hexagonal positioning rod are threadedly connected to the positioning stamping cylinder; the barbed gripping seat is fixedly installed at the bottom of the hexagonal positioning rod.

Furthermore, the pneumatic positioning mechanism includes a mobile positioning assembly and a positioning adjustment assembly. The mobile positioning assembly is arranged on the mobile frame; the mobile positioning assembly is respectively connected to the first pneumatic box and one of the second pneumatic boxes; the positioning adjustment assembly is on the mobile frame; the positioning adjustment assembly is respectively connected to the first pneumatic box and another second pneumatic box.

Furthermore, the movable positioning assembly and the positioning positioning assembly have the same structure, and both the movable positioning assembly and the positioning positioning assembly include a pump air cylinder, a pump air slider, a three-way pipe, a pump air positioning pipe, a pump air rotating rod, a pump air reciprocating screw rod and a pump air turntable; the pump air cylinder is arranged on a movable frame; the pump air slider is sealed and slidably arranged in the pump air cylinder, and the interior of the pump air cylinder is divided into a third stamping area and a third moving area by the pump air slider; one end of the three-way pipe is connected to the third stamping area, and the other two ends of the three-way pipe are respectively connected to the first pneumatic box and the second pneumatic box, and both ends of the three-way pipe connected to the first pneumatic box and the second pneumatic box are installed with one-way control valves; the The pump air positioning tube is located in the third moving area; one end of the pump air positioning tube is connected to the pump air slider; the other end of the pump air positioning tube passes through the pump air cylinder and extends to the outside of the pump air cylinder; one end of the pump air reciprocating screw is threadedly connected with a pump air ball nut group; the pump air ball nut group is slidably set on the moving frame; the pump air ball nut group is connected to the pump air positioning tube exposed outside the pump air cylinder on the side away from the pump air reciprocating screw, and the pump air positioning tube is movably sleeved on the outside of the pump air reciprocating screw; the pump air rotating rod is rotatably set on the moving frame; one end of the pump air rotating rod passes through the support and is fixedly connected to the pump air reciprocating screw; the other end of the pump air rotating rod is connected to the pump air turntable.

Furthermore, the pipeline positioning mechanism includes a positioning telescopic rod with a self-locking function, a positioning lifting rod and a positioning pipe clamping assembly; the positioning telescopic rod is installed on a mobile frame, and the telescopic end of the positioning telescopic rod is arranged on a side away from the pipeline misalignment adjustment mechanism; the positioning lifting rod is longitudinally slidably arranged at the telescopic end of the positioning telescopic rod; a plurality of third limit bolts for fixing the positioning lifting rod are threadedly connected on the positioning telescopic rod; the positioning pipe clamping assembly is rotatably arranged on the top of the positioning lifting rod.

Furthermore, the positioning tube clamping assembly includes a positioning frame, a tube clamping bidirectional screw rod, an arc-shaped tube clamping rod and a tube clamping turntable; the positioning frame is fixedly mounted on the positioning lifting rod; the tube clamping bidirectional screw rod is rotatably arranged in the positioning frame, and two ends of the tube clamping bidirectional screw rod are threadedly connected to two tube clamping ball nut groups that can move relative to each other; one end of the tube clamping bidirectional screw rod passes through the positioning frame, and its end is connected to the tube clamping turntable; two arc-shaped tube clamping rods are provided, and the two arc-shaped tube clamping rods are symmetrically arranged; the two arc-shaped tube clamping rods are respectively installed on the top of the two tube clamping ball nut groups.

Furthermore, the pipeline misalignment adjustment mechanism includes a misalignment adjustment box, a misalignment adjustment screw, a misalignment adjustment frame, a misalignment pipe clamping assembly and a cutting positioning plate; the misalignment adjustment box is arranged at the top center of the mobile frame; the misalignment adjustment screw penetrates along the length direction of the misalignment adjustment box and is rotatably arranged inside the misalignment adjustment box; a misalignment ball nut group is threadedly connected to the misalignment adjustment screw; the threads on the misalignment adjustment screws of the two pipeline misalignment adjustment mechanisms are in opposite directions; the misalignment adjustment frame is composed of a connecting slide and a support plate; the connecting slide is installed outside the misalignment ball nut group; the upper end of the connecting slide penetrates and is slidably arranged in the misalignment adjustment box On; the support plate is fixedly installed on the top of the connecting part, and the support plate is horizontally arranged along the top surface of the misalignment adjustment box; the structure of the misalignment clamping tube assembly is the same as that of the positioning clamping tube assembly; the positioning frame in the misalignment clamping tube assembly is rotatably arranged on the support plate of the misalignment adjustment frame; a cutting positioning through hole is horizontally penetrated at the bottom of the positioning frame of the misalignment clamping tube assembly; the cutting positioning plate is movably inserted in the cutting positioning through hole, and its end is exposed outside the cutting positioning through hole; a plurality of fourth limiting bolts for fixing the cutting positioning plate are threadedly connected to the positioning frame of the misalignment clamping tube assembly; a weld adjustment cavity is formed between the cutting positioning plates of the two pipeline misalignment adjustment mechanisms.

Furthermore, the power adjustment mechanism includes a power box, a power rotating rod, a power worm gear and a power worm; the power box is arranged on one side of the two misalignment adjustment boxes; one end of the misalignment adjustment screw rod passes through the misalignment adjustment box and is rotatably arranged inside the power box; the power rotating rod passes through the power box along the length direction and is rotatably arranged inside the power box; one end of the power rotating rod extends to the outside of the power box, and the end of the power rotating rod is connected to a power turntable; there are two power worm gears; the two power worm gears are respectively fixedly connected to the misalignment adjustment screw rods extending into the interior of the power box, and the power worm gears correspond one-to-one to the misalignment adjustment screw rods; there are two power worm gears; the two power worm gears are symmetrically installed at both ends of the power rotating rod, and the power worm gears correspond one-to-one to the power worm gears; the power worm gears and the power worm gears are meshed with each other.

A portable pipeline welding positioning method comprises the following steps:

S1. Portable movement. When the mobile frame is moving, the pumping turntable in the mobile positioning assembly is rotated to pump the gas in the second pneumatic box into the first pneumatic box, so that the air pressure in the first pneumatic box increases and the air pressure in the second pneumatic box decreases. After the air pressure in the first pneumatic box increases, the hexagonal moving rod in the mobile assembly drives the universal moving wheel to move in a direction away from the mobile frame, so that the universal moving wheel contacts the ground, and the position of the mobile frame is moved by the rotation of the universal moving wheel;

S2, positioning the frame. After the mobile frame is moved to the position where the pipe to be welded is required to be positioned, the pump air turntable in the positioning and adjusting assembly is rotated to pump the gas in the first pneumatic box into the second pneumatic box, so that the air pressure in the second pneumatic box increases and the air pressure in the first pneumatic box decreases. After the air pressure in the second pneumatic box increases, the hexagonal positioning rod in the positioning assembly drives the barbed gripping seat to move toward a position away from the mobile frame, so that the barbed gripping seat contacts the ground, and the mobile frame is positioned. At the same time, the height of the mobile frame can be adjusted by the movement of the hexagonal positioning rod, so that the pipe to be welded is flush with the arc-shaped clamping rod in the misaligned clamping assembly;

S3, welding pipe clamping, when positioning the pipes to be welded, since both pipes to be welded have a reserved length, the two pipes to be welded will be in a staggered state. According to the staggered positions of the two pipes to be welded, the power turntable in the power adjustment mechanism is rotated, and the dislocation clamping tube assemblies in the two pipe dislocation adjustment mechanisms are relatively moved by the rotation of the power turntable, and the two dislocation clamping tube assemblies are respectively moved to the corresponding pipes to be welded, and the pipes to be welded are placed in the dislocation clamping tube assemblies, and the arc-shaped clamping tube rods on the dislocation clamping tube assemblies are clamped to the pipes to be welded by rotating the clamping tube turntable;

S4, positioning the end point of the welding pipe, after positioning the front end of the pipe to be welded by the dislocation pipe clamping assembly, adjust the length of the positioning telescopic rod according to the inclination of the pipe to be welded, drive the positioning pipe clamping assembly to move by the positioning telescopic rod, rotate the power turntable again, so that the dislocation pipe clamping assembly continues to drive the pipe to be welded to move, so that the pipe to be welded is tilted, and the pipe to be welded is moved to the top of the positioning pipe clamping assembly by the inclination of the pipe to be welded, and the arc-shaped pipe clamping rod in the positioning pipe clamping assembly is clamped to the tail of the pipe to be welded by adjusting the position of the positioning lifting rod and rotating the pipe clamping turntable on the positioning pipe clamping assembly, so that the tails of the two pipes to be welded are on the same center line;

S5. Welding pipe cutting: after positioning the tail of the pipe to be welded, when cutting the reserved part of the pipe to be welded, the cutting equipment can cut the pipe along the side of the cutting positioning plate perpendicular to the pipe axis;

S6. Pipeline welding positioning: After cutting off the reserved part of the pipe to be welded, the power turntable is rotated to make the dislocation pipe clamp assembly drive the pipe to be welded to move again, so that the front ends of the two pipes to be welded are also on the same center line, and the pre-welding positioning operation of the pipe to be welded can be completed.

Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

1. By rotating the pump air turntable in the mobile adjustment component and the positioning adjustment component, not only can the positions of the universal moving wheel and the barbed gripping seat be alternately moved, but also the movement, fixation and lifting of the displacement of the mobile frame can be realized; and when positioning the mobile frame, when the ground is uneven, after one of the barbed gripping seats contacts the ground, the position of the hexagonal positioning rod can be fixed by tightening the second limit bolt until all the barbed gripping seats are in contact with the ground, so as to ensure that the mobile frame is in a horizontal state, which is convenient for positioning the position of the pipeline to be welded;

2. When positioning the welded pipe, by adjusting the positions of the positioning clamping assembly and the dislocation clamping assembly on the pipe positioning mechanism and the pipe dislocation adjustment mechanism, not only the center positions of the tails of the two pipes to be welded can be made to coincide, but also the center positions of the front ends of the two pipes to be welded can be made to coincide, so that the two pipes to be welded are in the same straight line, thereby improving the quality of pipe welding. When positioning the pipe, the pipe welding position can be positioned according to the pipe diameter, hardness, inclination and the position of the reserved pipe;

3. When positioning the pipe to be welded, when it is necessary to cut the reserved position on the pipe, after the positioning clamp assembly fixes the tail of the pipe, when the dislocation clamp assembly drives the front end of the pipe to be tilted and dislocated, the dislocation clamp assembly is affected by the angle offset of the pipe, and the dislocation clamp assembly will rotate on the dislocation adjustment frame, and the dislocation clamp assembly is always on the same axis as the pipe to be cut, and the rotation of the dislocation clamp assembly drives the cutting positioning plate to move, so the side of the cutting positioning plate away from the pipe positioning mechanism is always perpendicular to the center line of the front end of the pipe, then when the pipe is cut, the pipe can be cut along the side of the cutting positioning plate perpendicular to the pipe axis, and after the reserved part of the pipe to be welded is cut, the front ends of the two pipes to be welded are also on the same center line by rotating the power turntable, and the cut surfaces of the two welded pipes will be in a parallel state, ensuring the uniformity of the weld gap between the two pipes; and when regulating the gap between the two pipes, it is only necessary to adjust the position of the cutting positioning plate on the positioning frame to adjust the spacing between the two cutting positioning plates.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of the present invention.

FIG2 is a schematic diagram of a partial cross-section of the structure of the movable frame, the movable wheel mechanism, the frame positioning mechanism and the pneumatic positioning mechanism in the present invention.

FIG. 3 is a schematic structural diagram of a partial cross-section of a moving component in the present invention.

FIG. 4 is a schematic structural diagram of a partial cross-section of a positioning assembly in the present invention.

FIG. 5 is a schematic diagram of a partial cross-section of the positioning and adjusting component of the present invention.

FIG. 6 is a schematic diagram of the structure of the pipeline positioning mechanism in the present invention.

FIG. 7 is a schematic diagram of a partial cross-section of the structure of the pipeline misalignment adjustment mechanism in the present invention.

FIG8 is a schematic structural diagram of a partial cross-section of the power adjustment mechanism of the present invention.

FIG. 9 is a schematic diagram of a partially enlarged structure of point A in FIG. 1 of the present invention.

The marks in the attached drawings are: 001A, moving wheel mechanism; 002B, frame positioning mechanism; 003C, pneumatic positioning mechanism; 004D, pipeline positioning mechanism; 005E, pipeline misalignment adjustment mechanism; 006F, power adjustment mechanism;

1. Mobile frame; 2. First pneumatic positioning network; 3. First pneumatic box; 4. Mobile punching cylinder; 5. Mobile slider; 6. Hexagonal moving rod; 7. First limiting bolt; 8. Universal moving wheel; 9. Second pneumatic positioning network; 10. Second pneumatic box; 11. Positioning punching cylinder; 12. Positioning slider; 13. Hexagonal positioning rod; 14. Second limiting bolt; 15. Barbed gripping seat; 16. Pump air cylinder; 17. Pump air slider; 18. Three-way pipe; 19. One-way control valve; 20. Pump air positioning pipe; 21. Pump air rotating rod; 22. Pump air reciprocating screw rod; 23. Pump air ball nut assembly; 24. Pump air turntable; 25. Positioning telescopic rod; 26. Positioning lifting rod; 27. Third limiting bolt; 28. Positioning frame; 29. Tube clamping two-way screw rod; 30. Tube clamping ball nut assembly; 31. Arc-shaped tube clamping rod; 32. Tube clamping turntable; 33. Offset adjustment box; 34. Offset adjustment screw rod; 35. Offset ball nut assembly; 36. Offset adjustment frame; 37. Cut-off positioning plate; 38. Fourth limiting bolt; 39. Power box; 40. Power rotating rod; 41. Power turntable; 42. Power worm gear; 43. Power worm.

DETAILED DESCRIPTION

Embodiment 1:

The portable pipeline welding positioning device as shown in Figures 1 to 9 includes a mobile frame 1, a mobile wheel mechanism 001A with a position adjustment function, a frame positioning mechanism 002B with a specific position adjustment function, a pneumatic adjustment mechanism 003C, a pipeline positioning mechanism 004D with a telescopic function, a pipeline misalignment adjustment mechanism 005E with a cutting position indication function, and a power adjustment mechanism 006F with a self-locking function.

As mentioned above, the moving wheel mechanism 001A is arranged at the front and rear sides of the bottom of the moving frame 1, and is used for the movement of the moving frame 1; the moving wheel mechanism 001A includes a moving component, a first pneumatic positioning pipe network 2 and a first pneumatic box 3; there are four moving components, and the four moving components are evenly distributed at the four corners of the moving frame 1; the first pneumatic positioning pipe network 2 is arranged on the moving frame 1, and the first pneumatic positioning pipe network 2 is respectively connected to the four moving components; the first pneumatic box 3 is arranged at the center of the bottom of the moving frame 1, and the first pneumatic box 3 is connected to the first pneumatic positioning pipe network 2;

Among them, the mobile assembly includes a mobile punching cylinder 4, a mobile slider 5, a hexagonal mobile rod 6 and a universal mobile wheel 8; the mobile punching cylinder 4 is vertically arranged on the mobile frame 1; the mobile slider 5 is sealed and slidably arranged in the mobile punching cylinder 4, and the interior of the mobile punching cylinder 4 is divided into a first punching area and a first moving area through the mobile slider 5; the first pneumatic positioning pipe network 2 is connected to the first punching area; one end of the hexagonal mobile rod 6 is connected to the lower bottom surface of the mobile slider 5, and the other end of the hexagonal mobile rod 6 passes through the mobile punching cylinder 4 and extends to the bottom of the mobile frame 1; a plurality of first limit bolts 7 for fixing the hexagonal mobile rod 6 are threadedly connected to the mobile punching cylinder 4, and the universal mobile wheel 8 is installed at the bottom of the hexagonal mobile rod 6;

When in use, when the air pressure in the first pneumatic box 3 increases, the gas will be transmitted to the first stamping area of each mobile stamping cylinder 4 through the first pneumatic positioning pipe network 2, and when the pressure in the first stamping area increases, the mobile slider 5 will drive the hexagonal moving rod 6 and the universal moving wheel 8 to move in the direction away from the mobile frame 1, so that the universal moving wheel 8 is in contact with the ground. Under the action of the universal moving wheel 8, the portable movement of the mobile frame 1 is realized. When the mobile frame 1 is moved, in order to facilitate the stability of the position of the mobile frame 1, the position of the hexagonal moving rod 6 can be fixed by tightening the first limiting bolt 7;

On the contrary, when the air pressure in the first pneumatic box 3 decreases, the movable slider 5 will drive the hexagonal movable rod 6 to move in a direction close to the movable frame 1 .

As mentioned above, the frame positioning mechanism 002B is arranged on the left and right sides of the bottom of the mobile frame 1, and is used to horizontally position the position of the mobile frame 1; the frame positioning mechanism 002B includes a positioning component, a second pneumatic positioning pipe network 9 and a second pneumatic box 10; there are multiple positioning components, and the multiple positioning components are evenly distributed on the left and right sides of the mobile frame 1; the second pneumatic positioning pipe network 9 is arranged on the mobile frame 1, and the second pneumatic positioning pipe network 9 is respectively connected to the multiple positioning components; there are two second pneumatic boxes 10, and the two second pneumatic boxes 10 are staggered on the front and rear sides of the first pneumatic box 3, and the second pneumatic boxes 10 are respectively connected to the second pneumatic positioning pipe network 9;

Among them, the positioning assembly includes a positioning punching cylinder 11, a positioning slider 12, a hexagonal positioning rod 13 and a barbed gripping seat 15; the positioning punching cylinder 11 is vertically arranged on the mobile frame 1; the positioning slider 12 is sealed and slidably arranged in the positioning punching cylinder 11, and the interior of the positioning punching cylinder 11 is divided into a second punching area and a second moving area by the positioning slider 12; the second pneumatic positioning pipe network 9 is connected to the second punching area; one end of the hexagonal positioning rod 13 is connected to the lower bottom surface of the positioning slider 12, and the other end of the hexagonal positioning rod 13 passes through the positioning punching cylinder 11 and extends to the bottom of the mobile frame 1; a plurality of second limit bolts 14 for fixing the hexagonal positioning rod 13 are threadedly connected to the positioning punching cylinder 11, and the barbed gripping seat 15 is fixedly installed at the bottom of the hexagonal positioning rod 13;

During use, when the air pressure in the second pneumatic box 10 increases, the gas will be transmitted to the second stamping area of each positioning stamping cylinder 11 through the second pneumatic positioning pipe network 9, and when the pressure in the second stamping area increases, the positioning slider 12 will drive the hexagonal positioning rod 13 and the barbed ground gripping seat 15 to move in a direction away from the mobile frame 1, so that the barbed ground gripping seat 15 contacts the ground, and the position of the mobile frame 1 is fixed. After one of the barbed ground gripping seats 15 contacts the ground, the position of the hexagonal positioning rod 13 can be fixed by tightening the second limit bolt 14 until all the barbed ground gripping seats 15 are in contact with the ground, thereby ensuring that the mobile frame 1 is in a horizontal state.

As mentioned above, the pneumatic positioning mechanism 003C is arranged on the mobile frame 1, and the pneumatic positioning mechanism 003C is connected with the mobile wheel mechanism 001A and the frame positioning mechanism 002B respectively, and is used for the alternating movement of the mobile wheel mechanism 001A and the frame positioning mechanism 002B; the pneumatic positioning mechanism 003C includes a moving positioning component and a positioning positioning component; the moving positioning component is arranged on the mobile frame 1, and the moving positioning component is connected with the first pneumatic box 3 and one of the second pneumatic boxes 10 respectively, and is used to pump the gas in the second pneumatic box 10 into the first pneumatic box 3; the positioning positioning component is arranged on the mobile frame 1, and the positioning positioning component is connected with the first pneumatic box 3 and another second pneumatic box 10 respectively, and is used to pump the gas in the first pneumatic box 3 into the second pneumatic box 10;

Among them, the movable positioning component and the positioning positioning component have the same structure, and both the movable positioning component and the positioning positioning component include a pump air cylinder 16, a pump air slider 17, a three-way pipe 18, a pump air positioning pipe 20, a pump air rotating rod 21, a pump air reciprocating screw rod 22 and a pump air turntable 24; the pump air cylinder 16 is arranged on the movable frame 1; the pump air slider 17 is sealed and slidably arranged in the pump air cylinder 16, and the interior of the pump air cylinder 16 is divided into a third stamping area and a third moving area by the pump air slider 17; one end of the three-way pipe 18 is connected to the third stamping area, and the other two ends of the three-way pipe 18 are respectively connected to the first pneumatic box 3 and the second pneumatic box 10, and the other two ends of the three-way pipe 18 are installed with a one-way control valve 19; and the one-way control valve 19 on the three-way pipe 18 in the movable positioning component is conducted from the second pneumatic box 10 to the first pneumatic box 3; the three-way pipe in the positioning positioning component The one-way control valve 19 on the tube 18 is connected from the first pneumatic box 3 to the second pneumatic box 10; the pump air positioning tube 20 is located in the third moving area; one end of the pump air positioning tube 20 is connected to the pump air slider 17; the other end of the pump air positioning tube 20 passes through the pump air cylinder 16 and extends to the outside of the pump air cylinder 16; one end of the pump air reciprocating screw 22 is threadedly connected to the pump air ball nut group 23; the pump air ball nut group 23 is slidably arranged on the mobile frame 1; the pump air ball nut group 23 is connected to the pump air positioning tube 20 exposed outside the pump air cylinder 16 on the side away from the pump air reciprocating screw, and the pump air positioning tube 20 is movably sleeved on the outside of the pump air reciprocating screw 22; the pump air rotating rod 21 is rotatably arranged on the mobile frame 1; one end of the pump air rotating rod 21 passes through the support and is fixedly connected to the pump air reciprocating screw 22; the other end of the pump air rotating rod 21 is fixedly connected to the pump air turntable 24;

When in use, by rotating the pump gas turntable 24 in the mobile positioning assembly and the positioning adjustment assembly, the rotation of the pump gas turntable 24 drives the pump gas rotating rod 21 to rotate, and the rotation of the pump gas rotating rod 21 drives the pump gas reciprocating screw 22 to rotate, and the rotation of the pump gas reciprocating screw 22 causes the pump gas ball nut group 23 to perform linear reciprocating motion, and the movement of the pump gas ball nut group 23 drives the pump gas positioning tube 20 to move, and the movement of the pump gas positioning tube 20 drives the pump gas slider 17 to move, and the movement of the pump gas slider 17 is used to adjust the third stamping area in the pump gas cylinder 16 The size of the cavity in the third movable area can be adjusted by setting the installation direction of the one-way control valve 19. When the pump air turntable 24 in the movable positioning assembly is rotated, the gas in the second pneumatic box 10 is pumped into the first pneumatic box 3 through the three-way pipe 18, so that the air pressure in the first pneumatic box 3 is increased and the air pressure in the second pneumatic box 10 is reduced; when the pump air turntable 24 in the positioning and adjusting assembly is rotated, the gas in the first pneumatic box 3 can be pumped into the second pneumatic box 10, so that the air pressure in the second pneumatic box 10 is increased and the air pressure in the first pneumatic box 3 is reduced.

As mentioned above, the pipeline positioning mechanism 004D is provided with two groups, and the two groups of pipeline positioning mechanisms 004D are symmetrically arranged on both sides of the top of the mobile frame 1, and are used to fix the pipeline to be welded; the pipeline positioning mechanism 004D includes a positioning telescopic rod 25 with a self-locking function, a positioning lifting rod 26 and a positioning clamping tube assembly; the positioning telescopic rod 25 is installed on the mobile frame 1, and the telescopic end of the positioning telescopic rod 25 is arranged on a side away from the pipeline misalignment adjustment mechanism 005E; the positioning lifting rod 26 is longitudinally slidably arranged at the telescopic end of the positioning telescopic rod 25, and a plurality of third limiting bolts 27 for fixing the positioning lifting rod 26 are threadedly connected to the positioning telescopic rod 25, and the positioning clamping tube assembly is rotatably arranged on the top of the positioning lifting rod 26;

Among them, the positioning telescopic rod 25 is a common telescopic device with a self-locking function in the prior art. The specific structure is not the main innovation of the present application and will not be described in detail here. By adjusting the telescopic position of the positioning telescopic rod 25, the position of the positioning clamping tube assembly can be adjusted horizontally, and by sliding the positioning lifting rod 26 on the positioning telescopic rod 25, the position of the positioning clamping tube assembly can be adjusted longitudinally.

The positioning tube clamping assembly includes a positioning frame 28, a tube clamping bidirectional screw rod 29, an arc-shaped tube clamping rod 31 and a tube clamping turntable 32; the positioning frame 28 is fixedly mounted on the positioning lifting rod 26; the tube clamping bidirectional screw rod 29 is rotatably arranged in the positioning frame 28, and two ends of the tube clamping bidirectional screw rod 29 are threadedly connected to two tube clamping ball nut groups 30 that move relatively; one end of the tube clamping bidirectional screw rod 29 passes through the positioning frame 28, and its end is connected to the tube clamping turntable 32; there are two arc-shaped tube clamping rods 31, and the two arc-shaped tube clamping rods 31 are symmetrically arranged, and the two arc-shaped tube clamping rods 31 are respectively installed on the top of the two tube clamping ball nut groups 30, and the arc-shaped tube clamping rod 31 is slidably installed on the positioning frame 28 through the tube clamping ball nut group 30, which is used to position the tail end of the pipe to be welded;

When in use, the tube clamping turntable 32 is rotated, and the tube clamping turntable 32 drives the tube clamping bidirectional screw rod 29 to rotate. When the tube clamping bidirectional screw rod 29 rotates, the two tube clamping ball nut groups 30 move relative to each other. The movement of the tube clamping ball nut group 30 drives the arc tube clamping rod 31 to move, and the movement of the arc tube clamping rod 31 is used to clamp and fix the welding pipe.

As mentioned above, there are two groups of pipeline misalignment adjustment mechanisms 005E, and the two groups of pipeline misalignment adjustment mechanisms 005E are symmetrically arranged on the mobile frame 1, and the two groups of pipeline misalignment adjustment mechanisms 005E are arranged between the two groups of pipeline positioning mechanisms 004D; a welding cavity is formed between the two groups of pipeline misalignment adjustment mechanisms 005E, which is used to adjust the position of one side of the pipeline to be welded; the pipeline misalignment adjustment mechanism 005E includes a misalignment adjustment box 33, a misalignment adjustment screw rod 34, a misalignment adjustment frame 36, a misalignment clamping pipe assembly and a cutting positioning plate 37; the misalignment adjustment box 33 is arranged at the top center of the mobile frame 1, the misalignment adjustment screw rod 34 penetrates along the length direction of the misalignment adjustment box 33 and is rotatably arranged inside the misalignment adjustment box 33, and a misalignment ball nut group 35 is threadedly connected to the misalignment adjustment screw rod 34, and the threads on the two misalignment adjustment screw rods 34 have opposite rotation directions; the misalignment adjustment frame 36 is connected by a slide plate and a support plate The structure is one-piece; the connecting slide plate is installed on the outside of the offset ball nut group 35; the upper end of the connecting slide plate passes through and is slidably arranged on the offset adjustment box 33; the support plate is fixedly installed on the top of the connecting part, and the support plate is horizontally arranged along the top surface of the offset adjustment box 33; the offset clamping tube assembly has the same structure as the positioning clamping tube assembly, and the positioning frame 28 in the offset clamping tube assembly is rotatably arranged on the support plate of the offset adjustment frame 36, which is used to position the front end of the pipe to be welded; a cutting positioning through hole is horizontally penetrated at the bottom of the positioning frame 28 of the offset clamping tube assembly; the cutting positioning plate 37 is movably inserted in the cutting positioning through hole, and its end is exposed outside the cutting positioning through hole; a plurality of fourth limiting bolts 38 for fixing the cutting positioning plate 37 are threadedly connected to the positioning frame 28, and a weld adjustment cavity is formed between the two cutting positioning plates 37; a pull-out handle is provided on the side of the two cutting positioning plates 37 away from the weld adjustment cavity;

When in use, when the misalignment adjustment screw rod 34 rotates, the misalignment ball nut group 35 drives the misalignment adjustment frame 36 to move, and the movement of the misalignment adjustment frame 36 drives the misalignment pipe clamping assembly to move. When positioning the pipes to be welded, since the two pipes to be welded have a reserved length, the two pipes to be welded will be in a staggered state. According to the staggered positions of the two pipes to be welded, the power turntable 41 in the power adjustment mechanism 006F is rotated. Through the rotation of the power turntable 41, the misalignment pipe clamping assemblies in the two pipe misalignment adjustment mechanisms 005E are moved relative to each other, and the two misalignment pipe clamping assemblies are respectively moved to the corresponding pipes to be welded, and the pipes to be welded are placed in the misalignment pipe clamping assemblies. By rotating the pipe clamping turntable 32, the arc-shaped pipe clamping rod 31 on the misalignment pipe clamping assembly clamps the pipe to be welded.

When positioning the pipe to be welded and it is necessary to cut the reserved position on the pipe, after the positioning clamp assembly fixes the tail of the pipe, the dislocation clamp assembly drives the front end of the pipe to tilt and dislocate. The dislocation clamp assembly is affected by the angle offset of the pipe, and the dislocation clamp assembly rotates on the dislocation adjustment frame 36. The dislocation clamp assembly is always on the same axis as the pipe to be cut, and the rotation of the dislocation clamp assembly drives the cutting positioning plate 37 to move. Therefore, the side of the cutting positioning plate 37 away from the pipe positioning mechanism 004D is always perpendicular to the center line of the front end of the pipe. When the pipeline is cut, the pipeline can be cut along the side of the cutting positioning plate 37 perpendicular to the pipeline axis. After the reserved part of the pipeline to be welded is cut off, the power turntable 41 is rotated to make the front ends of the two pipelines to be welded also on the same center line. The cut surfaces of the two welded pipelines will be in a parallel state, ensuring the uniformity of the weld gap between the two pipelines. When adjusting the gap between the two pipelines, it is only necessary to adjust the position of the cutting positioning plate 37 on the positioning frame 28 by pulling the handle on the cutting positioning plate 37 to adjust the spacing between the two cutting positioning plates 37.

It should be noted that when the arc-shaped tube clamping rod 31 on the offset tube clamping assembly drives the pipe to be welded to tilt and deform, due to the sliding problem between the arc-shaped tube clamping rod 31 and the pipe, in order to protect the pipe, a sliding protective sleeve can be pre-coated on the pipe or a rotating shaft can be set on the arc-shaped tube clamping rod 31, so that the rotating shaft contacts the pipe and protects the outer layer of the pipe.

It is further explained that by adjusting the longitudinal position of the positioning tube clamping assembly through the positioning lifting rod 26, the positioning tube clamping assembly can be used without affecting the movement of the pipeline when the pipeline is driven to move by the offset tube clamping assembly. After the pipeline moves to the top of the positioning tube clamping assembly, the positioning tube clamping assembly can be moved to clamp the pipeline to be welded.

As mentioned above, the power regulating mechanism 006F is arranged on the side of the pipeline misalignment regulating mechanism 005E, and the power regulating mechanism 006F is respectively connected to the two sets of pipeline misalignment regulating mechanisms 005E in transmission, so as to drive the pipeline misalignment regulating mechanisms 005E to move; the power regulating mechanism 006F includes a power box 39, a power rotating rod 40, a power worm gear 42 and a power worm 43; the power box 39 is arranged on one side of the two misalignment regulating boxes 33, one end of the misalignment regulating screw rod 34 passes through the misalignment regulating box 33 and is rotatably arranged inside the power box 39; the power rotating rod 40 is arranged along the length of the power box 39 The power rotating rod 40 is provided with two power worm gears 42, which are respectively fixedly connected to the misalignment adjustment screw rod 34 extending into the power box 39, and the power worm gears 42 correspond to the misalignment adjustment screw rod 34 one by one; the power worm gears 43 are provided with two power worm gears 43, which are symmetrically installed at both ends of the power rotating rod 40, and the power worm gears 43 correspond to the power worm gears 42 one by one, and the power worm gears 43 and the power worm gears 42 are meshed with each other;

When in use, the power turntable 41 is rotated, and the rotation of the power turntable 41 can drive the power rotating rod 40 to rotate, and the rotation of the power rotating rod 40 can drive the power worm 43 to rotate, and the rotation of the power worm 43 can drive the misalignment adjustment screw 34 to rotate, and the rotation of the misalignment adjustment screw 34 can drive the misalignment clamping assembly to move. When the position of the misalignment clamping assembly is adjusted, the self-locking cooperation of the power worm 43 and the power worm wheel 42 can effectively ensure the stability of the position of the misalignment clamping assembly.

The portable pipeline welding positioning method of the present invention is specifically described as follows:

S1. Portable movement. When the mobile frame 1 is moved, the pumping turntable 24 in the mobile positioning assembly is rotated to pump the gas in the second pneumatic box 10 into the first pneumatic box 3, so that the air pressure in the first pneumatic box 3 increases and the air pressure in the second pneumatic box 10 decreases. After the air pressure in the first pneumatic box 3 increases, the hexagonal moving rod 6 in the moving assembly drives the universal moving wheel 8 to move in a direction away from the mobile frame 1, so that the universal moving wheel 8 contacts the ground, and the position of the mobile frame 1 is moved by the rotation of the universal moving wheel 8;

S2, frame positioning, after the mobile frame 1 is moved to the position where the pipe to be welded is required to be positioned, the pump air turntable 24 in the positioning and adjusting assembly is rotated to pump the gas in the first pneumatic box 3 into the second pneumatic box 10, so that the air pressure in the second pneumatic box 10 increases and the air pressure in the first pneumatic box 3 decreases. After the air pressure in the second pneumatic box 10 increases, the hexagonal positioning rod 13 in the positioning assembly drives the barbed gripping seat 15 to be positioned away from the mobile frame 1, so that the barbed gripping seat 15 contacts the ground, and the position of the mobile frame 1 is moved. At the same time, the height of the mobile frame 1 can be adjusted by the movement of the hexagonal positioning rod 13, so that the pipe to be welded is flush with the arc-shaped clamping rod 31 in the misaligned clamping assembly;

S3, welding pipe clamping, when positioning the pipes to be welded, since both pipes to be welded have a reserved length, the two pipes to be welded will be in a staggered state. According to the staggered positions of the two pipes to be welded, the power turntable 41 in the power adjustment mechanism 006F is rotated, and the dislocation clamping tube assemblies in the two pipe dislocation adjustment mechanisms 005E are relatively moved by the rotation of the power turntable 41, and the two dislocation clamping tube assemblies are respectively moved to the corresponding pipes to be welded, and the pipes to be welded are placed in the dislocation clamping tube assemblies, and the arc-shaped clamping tube rod 31 on the dislocation clamping tube assembly is clamped to the pipes to be welded by rotating the clamping tube turntable 32;

S4, positioning the end point of the welding pipe. After positioning the front end of the pipe to be welded by the dislocation pipe clamping assembly, adjust the length of the positioning telescopic rod 25 according to the inclination of the pipe to be welded, drive the positioning pipe clamping assembly to move by the positioning telescopic rod 25, and rotate the power turntable 41 again to make the dislocation pipe clamping assembly continue to drive the pipe to be welded to move, so that the pipe to be welded is tilted, and the pipe to be welded is moved to the top of the positioning pipe clamping assembly by the inclination of the pipe to be welded. By adjusting the position of the positioning lifting rod 26 and rotating the pipe clamping turntable 32 on the positioning pipe clamping assembly, the arc pipe clamping rod 31 in the positioning pipe clamping assembly clamps the tail of the pipe to be welded, so that the tails of the two pipes to be welded are on the same center line;

S5, welding pipe cutting, after positioning the tail of the pipe to be welded, when cutting the reserved part of the pipe to be welded, the cutting equipment can cut the pipe along the side of the cutting positioning plate 37 perpendicular to the pipe axis;

S6, pipeline welding positioning, after cutting off the reserved part of the pipeline to be welded, by rotating the power turntable 41, the dislocation pipe clamping assembly drives the pipeline to be welded to move again, so that the front ends of the two pipelines to be welded are also on the same center line, and the pre-welding positioning operation of the pipeline to be welded can be completed.

The above embodiments are only preferred implementations of the present invention, so all equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims (10)

1. A portable pipe welding positioning device, comprising:

a moving frame (1);

the movable wheel mechanism (001A) is arranged on two sides of the bottom of the movable frame (1);

The frame positioning mechanism (002B) is arranged at the other two sides of the bottom of the movable frame (1);

The pneumatic positioning mechanism (003C) is arranged on the movable frame (1), and the pneumatic positioning mechanism (003C) is respectively communicated with the movable wheel mechanism (001A) and the frame positioning mechanism (002B);

The two groups of pipeline positioning mechanisms (004D) are arranged on the two sides of the top of the movable frame (1) symmetrically;

The pipeline dislocation adjusting mechanisms (005E) are provided with two groups, and the two groups of pipeline dislocation adjusting mechanisms (005E) are symmetrically arranged between the two groups of pipeline positioning mechanisms (004D); a welding cavity is formed between the two groups of pipeline dislocation adjusting mechanisms (005E);

The power adjusting mechanism (006F) is arranged on the side face of the pipeline dislocation adjusting mechanism (005E), and the power adjusting mechanism (006F) is respectively in transmission connection with the two groups of pipeline dislocation adjusting mechanisms (005E).

2. The portable pipe welding positioning apparatus according to claim 1, wherein the moving wheel mechanism (001A) includes:

the four moving assemblies are uniformly distributed at four corners of the moving frame (1);

The first pneumatic positioning pipe network (2) is arranged on the mobile frame (1), and the first pneumatic positioning pipe network (2) is respectively communicated with the four mobile components;

The first pneumatic box (3) is arranged at the center of the bottom of the mobile frame (1), and the first pneumatic box (3) is communicated with the first pneumatic positioning pipe network (2);

each of the moving assemblies includes:

A movable punching cylinder (4), wherein the movable punching cylinder (4) is vertically arranged on the movable frame (1);

The movable sliding block (5) is hermetically and slidably arranged in the movable punching cylinder (4), and the interior of the movable punching cylinder (4) is divided into a first punching area and a first moving area through the movable sliding block (5); the first pneumatic positioning pipe network (2) is communicated with the first stamping area;

One end of the hexagonal movable rod (6) is connected with the lower bottom surface of the movable sliding block (5); the other end of the hexagonal movable rod (6) passes through the movable punching cylinder (4) and extends to the lower part of the movable frame (1); the bottom of the movable punching cylinder (4) is in threaded connection with a plurality of first limit bolts (7) for fixing the hexagonal movable rod (6);

the universal moving wheel (8), the universal moving wheel (8) is installed in the bottom of the hexagonal moving rod (6).

3. The portable pipe welding positioning apparatus according to claim 1, wherein the carriage positioning mechanism (002B) includes:

The positioning assemblies are arranged and uniformly distributed on the left side and the right side of the movable frame (1);

The second pneumatic positioning pipe network (9) is arranged on the movable frame (1), and the second pneumatic positioning pipe network (9) is respectively communicated with the plurality of positioning assemblies;

The two second pneumatic boxes (10) are arranged, the second pneumatic boxes (10) are arranged on the front side and the rear side of the first pneumatic box (3) in a staggered mode, and the two second pneumatic boxes (10) are respectively communicated with a second pneumatic positioning pipe network (9);

Each of the positioning assemblies includes:

The positioning punching cylinder (11), the positioning punching cylinder (11) is vertically arranged on the movable frame (1);

The positioning sliding block (12) is hermetically and slidingly arranged in the positioning punching cylinder (11), and the inside of the positioning punching cylinder (11) is divided into a second punching area and a second moving area through the positioning sliding block (12); the second pneumatic positioning pipe network (9) is communicated with the second stamping area;

One end of the hexagonal positioning rod (13) is connected with the lower bottom surface of the positioning sliding block (12), and the other end of the hexagonal positioning rod (13) penetrates through the positioning punching cylinder (11) and extends to the lower part of the moving frame (1); the positioning punching cylinder (11) is in threaded connection with a plurality of second limit bolts (14) for fixing the hexagonal positioning rod (13);

the barbed ground grabbing seat (15) is fixedly arranged at the bottom of the hexagonal positioning rod (13).

4. The portable pipe welding positioning device according to claim 1, wherein the pneumatic positioning mechanism (003C) comprises:

the movable positioning assembly is arranged on the movable frame (1); the movable positioning assembly is respectively connected with the first pneumatic box (3) and one of the second pneumatic boxes (10);

the positioning and positioning assembly is positioned on the movable frame (1); the positioning and positioning assembly is respectively connected with the first pneumatic box (3) and the other second pneumatic box (10).

5. The portable pipe welding positioning device of claim 4, wherein the mobile positioning assembly and the positioning assembly are identical in structure, and wherein the mobile positioning assembly and the positioning assembly each comprise:

A pump cylinder (16), wherein the pump cylinder (16) is arranged on the mobile frame (1);

The pumping slide block (17), the pumping slide block (17) is sealed and arranged in the pumping cylinder (16) in a sliding way, and the inside of the pumping cylinder (16) is divided into a third stamping area and a third moving area through the pumping slide block (17);

One end of the three-way pipe (18) is connected with the third stamping area, the other two ends of the three-way pipe (18) are respectively connected with the first pneumatic box (3) and the second pneumatic box (10), and one-way control valves (19) are arranged at two ends of the three-way pipe (18) connected with the first pneumatic box (3) and the second pneumatic box (10);

A pumping and positioning pipe (20), wherein the pumping and positioning pipe (20) is positioned in the third moving area; one end of the pumping position adjusting pipe (20) is connected with the pumping sliding block (17); the other end of the pumping positioning pipe (20) penetrates through the pumping cylinder (16) and extends to the outside of the pumping cylinder (16);

the device comprises a pumping reciprocating screw rod (22), wherein one end of the pumping reciprocating screw rod (22) is in threaded connection with a pumping ball nut group (23); the pumping ball nut group (23) is arranged on the movable frame (1) in a sliding way; one side of the pumping ball nut group (23) which is away from the pumping reciprocating screw rod is connected with a pumping position adjusting pipe (20) exposed outside the pumping cylinder (16);

The air pumping rotating rod (21) is rotatably arranged on the movable frame (1); one end of the pumping rotary rod (21) penetrates through the support and is fixedly connected with the pumping reciprocating screw rod (22); the other end of the pumping rotary rod (21) is connected with a pumping rotary disc (24).

6. The portable pipe welding positioning device according to claim 1, wherein the pipe positioning mechanism (004D) comprises:

The positioning telescopic rod (25), the positioning telescopic rod (25) is arranged on the movable frame (1), and the telescopic end of the positioning telescopic rod (25) is arranged at one side far away from the pipeline dislocation adjusting mechanism (005E);

The positioning lifting rod (26) is longitudinally arranged at the telescopic end of the positioning telescopic rod (25) in a sliding manner; the positioning telescopic rod (25) is in threaded connection with a plurality of third limit bolts (27) for fixing the positioning lifting rod (26);

and the positioning clamp pipe assembly is rotatably arranged at the top of the positioning lifting rod (26).

7. The portable pipe welding positioning device of claim 6, wherein said positioning clip assembly comprises:

the positioning frame (28), the positioning frame (28) is fixedly arranged on the positioning lifting rod (26);

The clamping pipe bidirectional screw rod (29) is rotatably arranged in the positioning frame (28), and two ends of the clamping pipe bidirectional screw rod (29) are connected with two clamping pipe ball nut groups (30) which move relatively in a threaded manner; one end of the clamping tube bidirectional screw rod (29) passes through the positioning frame (28), and the end part of the clamping tube bidirectional screw rod is connected with a clamping tube turntable (32);

The arc-shaped pipe clamping rods (31), wherein two arc-shaped pipe clamping rods (31) are arranged, and the two arc-shaped pipe clamping rods (31) are symmetrically arranged; the two arc-shaped pipe clamping rods (31) are respectively arranged at the tops of the two pipe clamping ball nut groups (30).

8. The portable pipe welding positioning apparatus according to claim 1, wherein the pipe misalignment adjusting mechanism (005E) comprises:

The dislocation adjusting box (33), the dislocation adjusting box (33) is arranged in the center of the top of the movable frame (1);

The dislocation adjusting screw rod (34) penetrates through the dislocation adjusting box (33) along the length direction of the dislocation adjusting box (33) and is rotatably arranged in the dislocation adjusting box (33); the dislocation adjusting screw rod (34) is connected with a dislocation ball nut group (35) in a threaded manner; threads on dislocation adjusting screw rods (34) of the two pipeline dislocation adjusting mechanisms (005E) are opposite in rotation direction;

The dislocation adjusting frame (36), the dislocation adjusting frame (36) is formed by connecting a sliding plate and a supporting plate integrally; the connecting sliding plate is arranged outside the misplaced ball nut group (35); the upper end of the connecting sliding plate penetrates through and is arranged on the dislocation adjusting box (33) in a sliding manner; the supporting plate is fixedly arranged at the top of the connecting part, and is horizontally arranged along the top surface of the dislocation adjusting box (33);

the dislocation pipe clamping assembly has the same structure as the positioning pipe clamping assembly; the positioning frame (28) in the dislocation clamping tube assembly is rotatably arranged on the supporting plate of the dislocation adjusting frame (36); the bottom of a positioning frame (28) of the dislocation clamping tube assembly is horizontally provided with a cutting positioning through hole in a penetrating way;

The cutting positioning plate (37) is movably inserted into the cutting positioning through hole, and the end part of the cutting positioning plate (37) is exposed out of the cutting positioning through hole; a positioning frame (28) of the dislocation pipe clamping assembly is connected with a plurality of fourth limit bolts (38) for fixing and cutting off a positioning plate (37) through threads; a welding seam adjusting cavity is formed between the cutting locating plates (37) of the two pipeline dislocation adjusting mechanisms (005E).

9. The portable pipe welding positioning apparatus as defined in claim 1, wherein said power adjustment mechanism (006F) comprises:

the power box (39), the said power box (39) is set up in one side of two dislocation regulating boxes (33); one end of the dislocation adjusting screw rod (34) penetrates through the dislocation adjusting box (33) and is rotatably arranged in the power box (39);

The power rotating rod (40) penetrates through the power box (39) along the length direction, and is rotatably arranged in the power box (39); one end of the power rotating rod (40) extends to the outside of the power box (39), and the end part of the power rotating rod (40) is connected with a power rotating disc (41);

A power worm wheel (42), wherein the power worm wheel (42) is provided with two; the two power worm wheels (42) are fixedly connected with dislocation adjusting screw rods (34) extending into the power box (39) respectively, and the power worm wheels (42) are in one-to-one correspondence with the dislocation adjusting screw rods (34);

A power worm (43), wherein the power worm (43) is provided with two; the two power worms (43) are symmetrically arranged at two ends of the power rotating rod (40), and the power worms (43) are in one-to-one correspondence with the power worm wheels (42); the power worm (43) is meshed with the power worm wheel (42).

10. A portable pipe welding positioning method using the portable pipe welding positioning device according to any one of claims 1 to 9, characterized by comprising the steps of:

S1, carrying out portable movement, when a moving frame (1) is moved, rotating a pumping turntable (24) in a moving positioning assembly, pumping gas in a second pneumatic box (10) into a first pneumatic box (3), increasing the air pressure in the first pneumatic box (3), reducing the air pressure in the second pneumatic box (10), and after the air pressure in the first pneumatic box (3) is increased, driving a universal moving wheel (8) to move in a direction away from the moving frame (1) by a hexagonal moving rod (6) in the moving assembly, enabling the universal moving wheel (8) to contact with the ground, and moving the position of the moving frame (1) through the rotation of the universal moving wheel (8);

S2, positioning the frame, after moving the movable frame (1) to a position where a pipeline to be welded is required to be positioned, rotating a pumping turntable (24) in a positioning and positioning assembly, pumping gas in a first pneumatic box (3) into a second pneumatic box (10), increasing the gas pressure in the second pneumatic box (10), reducing the gas pressure in the first pneumatic box (3), after increasing the gas pressure in the second pneumatic box (10), driving a barbed ground seat (15) to move towards a position far away from the movable frame (1) by a hexagonal positioning rod (13), enabling the barbed ground seat (15) to be in contact with the ground, positioning the movable frame (1), and simultaneously adjusting the height of the movable frame (1) through the movement of the hexagonal positioning rod (13), so that the pipeline to be welded is flush with an arc-shaped pipe clamping rod (31) in a dislocation pipe clamping assembly;

S3, clamping welded pipes, wherein when the pipes to be welded are positioned, as the two pipes to be welded are reserved in length, the two pipes to be welded are in a staggered state, according to the staggered positions of the two pipes to be welded, a power turntable (41) in a power adjusting mechanism (006F) is rotated, the dislocation pipe clamping assemblies in two pipe dislocation adjusting mechanisms (005E) are enabled to move relatively through the rotation of the power turntable (41), the two dislocation pipe clamping assemblies are respectively moved to the positions of the corresponding pipes to be welded, the pipes to be welded are placed in the dislocation pipe clamping assemblies, and an arc-shaped pipe clamping rod (31) on the dislocation pipe clamping assemblies is enabled to clamp the pipes to be welded through the rotation of the pipe clamping turntable (32);

S4, positioning the end point of a welded pipe, positioning the front end of the pipe to be welded through a dislocation pipe clamping assembly, adjusting the length of a positioning telescopic rod (25) according to the inclination of the pipe to be welded, driving the positioning pipe clamping assembly to move through the positioning telescopic rod (25), rotating a power turntable (41) again to enable the dislocation pipe clamping assembly to continuously drive the pipe to be welded to move, enabling the pipe to be welded to incline, enabling the pipe to be welded to move to the upper side of the positioning pipe clamping assembly through the inclination of the pipe to be welded, and enabling an arc-shaped pipe clamping rod (31) in the positioning pipe clamping assembly to clamp the tail of the pipe to be welded by adjusting the position of a positioning lifting rod (26) and rotating a pipe clamping turntable (32) on the positioning pipe clamping assembly so that the tail of two pipes to be welded are located on the same central line;

S5, cutting a welded pipe, namely after the tail part of the pipe to be welded is positioned, when cutting a reserved part of the pipe to be welded, cutting the pipe by cutting equipment along one side of a cutting positioning plate (37) perpendicular to the axis of the pipe;

s6, pipeline welding and positioning, namely cutting off reserved parts of pipelines to be welded, and then driving the pipelines to be welded to move again by rotating the power turntable (41), so that the front ends of the two pipelines to be welded are also positioned on the same central line, and the positioning operation before welding of the pipelines to be welded can be completed.